I'm 24 (25 next month) and have been cosplaying for about 4 years now. I'm from brisbane and I definatly agree with Simetra on the fact that we have more money to make cosplay
But never any time due to work :S
And I wouldn't really think 24 as old in cosplay terms. I know cosplayers that are 30+ and I intend to cosplay right into my retirment home :P.
But yeah feel free to pm I always love to talk about cosplaying and video games